Buying a house is supposed to feel like a fresh start. You sign the papers, grab the keys, and finally relax a little.
Then out of nowhere, you find out the previous owner did work on the home without permits – and didn’t tell you. Now you’re wondering how serious it is, how much it’s going to cost, and if you’ve got any options.
The good news? You’re not stuck. There’s a clear way to handle this.
In this post, we’ll show you what to do if the seller didn’t disclose unpermitted work.
#1. Confirm It’s Actually Unpermitted
Before you get your feathers ruffled and start drafting angry emails, you have to be 100% sure the work is actually illegal.
Sometimes a previous owner did everything by the book, but the city’s digital records are just a mess, or perhaps the permit was filed under a slightly different address or an old parcel number.
You’ll want to take a trip down to your local building department or check their online portal to pull the permit history for your specific property.
Compare what’s on file with what you see in front of you; if there’s a brand-new primary suite or a finished basement that doesn’t appear in the records, then you’ve officially confirmed the discrepancy.
It is also worth asking the neighbors if they remember construction crews at the house, as local gossip can sometimes be more accurate than a government database.
Also Read: Can you spot fraud in technical real estate documents?
#2. Document Everything
This part matters more than most people realize.
If things escalate, documentation is what protects you. Start gathering:
- Photos and videos of the unpermitted work
- A copy of the listing description
- The seller disclosure form
- Inspection reports
- Emails or messages with the seller or agent
- Written repair estimates from licensed contractors
Keep everything organized in one folder, digital and physical if possible. Dates matter. Details matter. If the seller marked “no known unpermitted work” on the disclosure, that becomes important very quickly.
Even if you’re not planning legal action yet, assume you might need this information later. Future-you will be grateful.
#3. Figure Out The Risk Level
Not all unpermitted work carries the same weight.
Replacing a water heater without a permit? Annoying, but usually fixable.
Adding a structural beam without engineering approval? That’s a different level of risk.
Electrical changes, plumbing reroutes, room additions, garage conversions, and load-bearing wall removals tend to be the big ones. These can affect safety, resale value, insurance coverage, and financing.
On the other hand, cosmetic upgrades like flooring or cabinets usually don’t create major compliance problems.
The real question is: does this impact safety or property value?
If the work was done poorly or violates code, that’s when things get expensive. A licensed contractor can help assess if the work is solid or if it needs to be opened up and corrected.
Also Read: What should you consider before buying real estate?
#4. Check Your Seller Disclosure
Now, go dig up that thick stack of papers you signed at closing and find the Seller’s Disclosure statement.
In most places, sellers are legally required to tell you about any known unpermitted work or structural changes they made.
If the seller checked the box saying “no unpermitted work” and you have proof that they actually did the work themselves, you might have a case of misrepresentation.
It is important to remember that they only have to disclose what they knew about.
If the person before them did the work and never told them, the seller might be just as surprised as you are, which makes things a bit more complicated for you.
#5. Talk To A Real Estate Attorney
If the issue is more than minor, it’s time to talk to a real estate attorney.
An attorney can tell you if you have grounds for:
- Failure to disclose
- Misrepresentation
- Fraud
- Breach of contract
Sometimes a formal demand letter gets results fast. Sellers don’t usually want legal trouble hanging over them. In other situations, mediation or a lawsuit may be necessary.
Also, don’t sit on this for too long. Every state has deadlines for filing claims and waiting can weaken your case.
A short consultation can give you clarity and direction, even if you never step into a courtroom.
#6. Consider Title Insurance
Most people forget about their title insurance policy after closing.
Now is the time to dig it out.
Title insurance primarily protects against ownership and legal claim issues, but in certain situations it may offer coverage tied to property use or undisclosed problems affecting title.
Call your title company and explain what’s going on. It costs nothing to ask, and sometimes there’s more coverage than you expect.
Even if they don’t cover repairs directly, they may provide guidance on next steps.
#7. Decide: Legalize It Or Remove It
Once you understand the situation, you’ll have a decision to make.
You can:
- Apply for retroactive permits
- Open up walls for inspection
- Bring everything up to current code
- Remove the work entirely
Retroactive permits are common, but they’re not always simple. The city may require inspections, plans, engineering reports, and corrections. That can mean drywall removal or redoing electrical connections so inspectors can see inside.
Sometimes legalizing the work costs less than tearing it out.
Other times removal is cleaner and faster.
#8. Know What You’re Trying To Recover
If you decide to go after the seller, you need to be very clear about what you want.
Are you looking for the cost of the retroactive permit, the price of the repairs needed to make the room safe, or the difference in the home’s value now that you know it’s smaller than advertised?
Most of the time, these disputes end in a settlement where the seller pays a portion of the costs to make the problem go away.
Don’t expect to get a full refund for the house; instead, focus on getting enough cash to cover the “fix” so you can move on with your life.
Also Read: When you need a real estate lawyer
What Happens If You Do Nothing?
Some homeowners decide to ignore it, especially if the work looks fine and functions properly.
That can work for a while. But problems tend to surface later.
When you go to sell, buyers may check permit history. Lenders sometimes review appraisals closely. Insurance claims can get complicated if damage connects to unpermitted work.
And if the city discovers it during another inspection, you could face fines or mandatory corrections.
Doing nothing might feel easier in the short term.
Long term, it can become more expensive and stressful.
At minimum, understand your risk before choosing to ignore it.
When Is It Worth Suing?
Litigation is expensive, stressful, and slow, so you really only want to go down this road if the numbers make sense.
If the cost to fix the unpermitted work is $2,000, you’ll spend more than on a lawyer before you even get to a courtroom.
However, if the seller hid a massive, unpermitted addition that is now sinking into the ground and will cost $50,000 to repair, then a lawsuit is absolutely on the table.
You need “clear and convincing” evidence that the seller knew about the issue and intentionally lied about it. If you can’t prove they knew, your chances of winning drop significantly, so talk to your lawyer about the strength of your evidence before you file that paperwork.
Bottom Line
If a seller didn’t disclose unpermitted work and you can show they knew about it, you may have legal grounds to recover damages.
The strength of your case depends on documentation, disclosure language, and state law.
Start by gathering paperwork, and then talk to a real estate attorney in your state. Most offer consultations and can quickly tell you if it’s worth pursuing.